Service showing many issues on Prius

welcome!

low mpg can have many causes, and dealers are in business to make money.
so let's go over a few things to see where you are at.
how many miles on her?

 

R U N !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

And find another, this time, qualified dealer. If there was ANY "safety" issue with the HV pack or system, you would have warning light(s) and DTCs. This STEALership is fishing for work!

Did I say RUN?

 

Your words, “The car has been running fine” Stick to your instincts, many of the water pumps seep a bit. Check all your fluid levels, radiator, inverter. As to 35 mpg that’s more serious, check the air intake just after the air filter, Always try rebooting, doesn’t hurt anything. As for brake pads, I always ride the brake, as that is the charging assist, in drive or brake position. You should not have that type of wear. Iv never changed brake pads on a Prius. If the previous owner coasted in neutral a lot and hit the brakes in neutral, only then would you have that much brake wear. How many miles on the car.

 

Agree, get another opinion.

 

As an aside, a seeping water pump will not suddenly turn into a major problem as long as coolant level is maintained in the ENGINE system. There is NO low coolant warning on cars and all you get for temperature is a thermometer looking warning lamp.... it's too late at that point.

 

One of the pertinent suggestions made to me by Patrick was to check temps all around the water pump e with a infrared thermometer gun including engine, radiator water, inverter coolant, etc. Also good to have around the house too.

 

Poor mileage and worn brake pads. Jack up all 4 wheels, with the car in neutral, the wheels should turn easily with NO drag. You are the second owner?

 

A compression test.

 

We really need something like the MOT in the states, way too many vehicles on the road that are anything but roadworthy.

In other news, you can gauge the health of the HV battery by driving it at low speeds on level ground with the engine fully warmed up. If you can only drive blocks in electric mode, no matter how gentle you are, that suggests the HV battery is getting weak. A good HV battery can go up to about 8 MILES in EV mode (engine off, <25 MPH on level ground) as I have done so a couple times; both before and after our HV pack failed a module that I replaced.

 

The garage who done the MOT may not be as good as you think, I would report them to the official agency that certifys the business to do MOTS. If I remember correctly that inspection is basically a safety inspection.
So, they may not be interested in operation. Go talk to them.